Here is the implementation of ($r|$s)->is_hook_enabled($hook_name). See the test at the very end of the patch. The immediate use example can be:

r->subprocess_env unless $r->is_hook_enabled('SetupEnv');

I'm not sure about the name of this method though. If it tests PerlOptions, may be it should be called just that: is_perl_option_enabled()? the _hook_ part comes from:
http://perl.apache.org/docs/2.0/user/config/config.html#C_Perl_Handler_
but really works for any of:
http://perl.apache.org/docs/2.0/user/config/config.html#C_PerlOptions_


Index: Changes
===================================================================
RCS file: /home/cvs/modperl-2.0/Changes,v
retrieving revision 1.297
diff -u -u -r1.297 Changes
--- Changes     3 Jan 2004 01:17:33 -0000       1.297
+++ Changes     9 Jan 2004 00:38:54 -0000
@@ -442,6 +442,9 @@
 similar to SetEnv, upcase the env keys for PassEnv on platforms with
 caseless env (e.g. win32) [EMAIL PROTECTED]

+added ($r|$s)->is_hook_enabled($hook_name), to test for PerlOptions
++ tests [Stas]
+
 Add a backcompat wrapper for $r->notes (mp2 supports only the
 APR::Table API) [Stas]

Index: src/modules/perl/modperl_config.c
===================================================================
RCS file: /home/cvs/modperl-2.0/src/modules/perl/modperl_config.c,v
retrieving revision 1.72
diff -u -u -r1.72 modperl_config.c
--- src/modules/perl/modperl_config.c   23 Dec 2003 00:34:36 -0000      1.72
+++ src/modules/perl/modperl_config.c   9 Jan 2004 00:38:54 -0000
@@ -489,3 +489,38 @@

     return NULL;
 }
+
+
+/* if r!=NULL check for dir PerlOptions, otherwise check for server
+ * PerlOptions, (s must be always set)
+ */
+int modperl_config_is_hook_enabled(pTHX_ request_rec *r, server_rec *s,
+                                   const char *name)
+{
+    U32 flag;
+    MP_dSCFG(s);
+
+    /* XXX: should we test whether perl is disabled for this server? */
+    /*  if (!MpSrvENABLE(scfg)) { */
+    /*      return 0;             */
+    /*  }                         */
+
+    if (r) {
+        if ((flag = modperl_flags_lookup_dir(name))) {
+            MP_dDCFG;
+            return MpDirFLAGS(dcfg) & flag ? 1 : 0;
+        }
+        else {
+            Perl_croak(aTHX_ "PerlOptions %s is not a directory option", name);
+        }
+    }
+    else {
+        if ((flag = modperl_flags_lookup_srv(name))) {
+            return MpSrvFLAGS(scfg) & flag ? 1 : 0;
+        }
+        else {
+            Perl_croak(aTHX_ "PerlOptions %s is not a server option", name);
+        }
+    }
+
+}
Index: src/modules/perl/modperl_config.h
===================================================================
RCS file: /home/cvs/modperl-2.0/src/modules/perl/modperl_config.h,v
retrieving revision 1.31
diff -u -u -r1.31 modperl_config.h
--- src/modules/perl/modperl_config.h   5 Sep 2002 01:47:39 -0000       1.31
+++ src/modules/perl/modperl_config.h   9 Jan 2004 00:38:54 -0000
@@ -122,4 +122,9 @@
                                           SV *lines,
                                           char *path,
                                           int override);
+
+int modperl_config_is_hook_enabled(pTHX_ request_rec *r, server_rec *s,
+                                   const char *name);
+
+
 #endif /* MODPERL_CONFIG_H */
Index: xs/Apache/RequestUtil/Apache__RequestUtil.h
===================================================================
RCS file: /home/cvs/modperl-2.0/xs/Apache/RequestUtil/Apache__RequestUtil.h,v
retrieving revision 1.18
diff -u -u -r1.18 Apache__RequestUtil.h
--- xs/Apache/RequestUtil/Apache__RequestUtil.h 30 Aug 2003 02:33:26 -0000      1.18
+++ xs/Apache/RequestUtil/Apache__RequestUtil.h 9 Jan 2004 00:38:55 -0000
@@ -248,3 +248,10 @@
     return svh.sv;
 }

+static MP_INLINE
+int mpxs_Apache__RequestRec_is_hook_enabled(pTHX_ request_rec *r,
+                                            const char *name)
+{
+    return modperl_config_is_hook_enabled(aTHX_ r, r->server, name);
+}
+
Index: xs/Apache/ServerUtil/Apache__ServerUtil.h
===================================================================
RCS file: /home/cvs/modperl-2.0/xs/Apache/ServerUtil/Apache__ServerUtil.h,v
retrieving revision 1.8
diff -u -u -r1.8 Apache__ServerUtil.h
--- xs/Apache/ServerUtil/Apache__ServerUtil.h   19 Nov 2001 23:46:48 -0000      1.8
+++ xs/Apache/ServerUtil/Apache__ServerUtil.h   9 Jan 2004 00:38:55 -0000
@@ -51,6 +51,13 @@
     return ap_server_root_relative(p, fname);
 }

+static MP_INLINE
+int mpxs_Apache__Server_is_hook_enabled(pTHX_ server_rec *s,
+                                           const char *name)
+{
+    return modperl_config_is_hook_enabled(aTHX_ NULL, s, name);
+}
+
 static void mpxs_Apache__ServerUtil_BOOT(pTHX)
 {
     newCONSTSUB(PL_defstash, "Apache::server_root",
Index: xs/maps/modperl_functions.map
===================================================================
RCS file: /home/cvs/modperl-2.0/xs/maps/modperl_functions.map,v
retrieving revision 1.63
diff -u -u -r1.63 modperl_functions.map
--- xs/maps/modperl_functions.map       23 Dec 2003 03:02:34 -0000      1.63
+++ xs/maps/modperl_functions.map       9 Jan 2004 00:38:55 -0000
@@ -21,6 +21,7 @@
  mpxs_Apache__RequestRec_push_handlers
  mpxs_Apache__RequestRec_set_handlers
  mpxs_Apache__RequestRec_get_handlers
+ mpxs_Apache__RequestRec_is_hook_enabled
  mpxs_Apache__RequestRec_location
  mpxs_Apache__RequestRec_as_string
  mpxs_Apache__RequestRec_pnotes | | r, key=Nullsv, val=Nullsv
@@ -67,6 +68,7 @@
  mpxs_Apache__Server_push_handlers
  mpxs_Apache__Server_set_handlers
  mpxs_Apache__Server_get_handlers
+ mpxs_Apache__Server_is_hook_enabled
  modperl_config_insert_server | | | add_config

 PACKAGE=Apache::Server
Index: xs/tables/current/ModPerl/FunctionTable.pm
===================================================================
RCS file: /home/cvs/modperl-2.0/xs/tables/current/ModPerl/FunctionTable.pm,v
retrieving revision 1.134
diff -u -u -r1.134 FunctionTable.pm
--- xs/tables/current/ModPerl/FunctionTable.pm  23 Dec 2003 03:02:34 -0000      1.134
+++ xs/tables/current/ModPerl/FunctionTable.pm  9 Jan 2004 00:38:55 -0000
@@ -1369,6 +1369,28 @@
     ]
   },
   {
+    'return_type' => 'int',
+    'name' => 'modperl_config_is_hook_enabled',
+    'args' => [
+      {
+        'type' => 'PerlInterpreter *',
+        'name' => 'my_perl'
+      },
+      {
+        'type' => 'request_rec *',
+        'name' => 's'
+      },
+      {
+        'type' => 'server_rec *',
+        'name' => 's'
+      },
+      {
+        'type' => 'const char *',
+        'name' => 'name'
+      }
+    ]
+  },
+  {
     'return_type' => 'apr_status_t',
     'name' => 'modperl_config_req_cleanup',
     'args' => [
@@ -5562,6 +5584,24 @@
     ]
   },
   {
+    'return_type' => 'int',
+    'name' => 'mpxs_Apache__RequestRec_is_hook_enabled',
+    'args' => [
+      {
+        'type' => 'PerlInterpreter *',
+        'name' => 'my_perl'
+      },
+      {
+        'type' => 'request_rec *',
+        'name' => 'r'
+      },
+      {
+        'type' => 'const char *',
+        'name' => 'name'
+      }
+    ]
+  },
+  {
     'return_type' => 'char *',
     'name' => 'mpxs_Apache__RequestRec_location',
     'args' => [
@@ -5977,6 +6017,24 @@
   {
     'return_type' => 'SV *',
     'name' => 'mpxs_Apache__Server_get_handlers',
+    'args' => [
+      {
+        'type' => 'PerlInterpreter *',
+        'name' => 'my_perl'
+      },
+      {
+        'type' => 'server_rec *',
+        'name' => 's'
+      },
+      {
+        'type' => 'const char *',
+        'name' => 'name'
+      }
+    ]
+  },
+  {
+    'return_type' => 'int',
+    'name' => 'mpxs_Apache__Server_is_hook_enabled',
     'args' => [
       {
         'type' => 'PerlInterpreter *',


--- /dev/null 1969-12-31 16:00:00.000000000 -0800 +++ t/hooks/is_enabled.t 2004-01-08 16:57:08.000000000 -0800 @@ -0,0 +1,13 @@ +use strict; +use warnings FATAL => 'all'; + +use Apache::Test; +use Apache::TestUtil; +use Apache::TestRequest; + +my $module = "TestHooks::is_enabled"; +Apache::TestRequest::module($module); +my $hostport = Apache::TestRequest::hostport(Apache::Test::config()); +my $location = "http://$hostport/$module";; + +print GET_BODY_ASSERT "http://$hostport/$module";;

--- /dev/null   1969-12-31 16:00:00.000000000 -0800
+++ t/hooks/TestHooks/is_enabled.pm     2004-01-08 16:58:47.000000000 -0800
@@ -0,0 +1,53 @@
+package TestHooks::is_enabled;
+
+# test various ways to push handlers
+
+use strict;
+use warnings FATAL => 'all';
+
+use Apache::RequestRec ();
+use Apache::RequestIO ();
+use Apache::RequestUtil ();
+use Apache::ServerUtil ();
+
+use Apache::Test;
+use Apache::TestUtil;
+
+use Apache::Const -compile => qw(OK DECLINED DONE);
+
+my @srv_plus  = qw(ChildInit ChildExit);
+my @srv_minus = qw(PreConnection ProcessConnection Autoload Log
+                   InputFilter OutputFilter);
+my @dir_plus  = qw(ParseHeaders MergeHandlers);
+my @dir_minus = qw(SetupEnv GlobalRequest);
+
+sub handler {
+    my $r = shift;
+
+    plan $r, tests => @srv_plus + @srv_minus + @dir_plus + @dir_minus;
+    my $s = $r->server;
+    ok t_cmp(1, $s->is_hook_enabled($_), "PerlOptions +$_") for @srv_plus;
+    ok t_cmp(0, $s->is_hook_enabled($_), "PerlOptions -$_") for @srv_minus;
+    ok t_cmp(1, $r->is_hook_enabled($_), "PerlOptions +$_") for @dir_plus;
+    ok t_cmp(0, $r->is_hook_enabled($_), "PerlOptions -$_") for @dir_minus;
+
+    return Apache::OK;
+}
+
+1;
+__DATA__
+<NoAutoConfig>
+  <VirtualHost TestHooks::is_enabled>
+      PerlOptions -PreConnection -ProcessConnection
+      PerlOptions -Autoload -Log -InputFilter -OutputFilter
+      PerlOptions +ChildInit +ChildExit
+      PerlModule TestHooks::is_enabled
+      <Location /TestHooks::is_enabled>
+          SetHandler modperl
+          PerlOptions -GlobalRequest -SetupEnv
+          PerlOptions +ParseHeaders +MergeHandlers
+          PerlResponseHandler TestHooks::is_enabled
+      </Location>
+  </VirtualHost>
+</NoAutoConfig>
+

__________________________________________________________________
Stas Bekman            JAm_pH ------> Just Another mod_perl Hacker
http://stason.org/     mod_perl Guide ---> http://perl.apache.org
mailto:[EMAIL PROTECTED] http://use.perl.org http://apacheweek.com
http://modperlbook.org http://apache.org   http://ticketmaster.com


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